Road working machinery



March 12, 1940. J. F. HARRISON ET AL ROAD WORKING MACHINERY Filed Aug. 26, 1938 3 Sheets-Sheet 1 w mm .m TwM m WR MO VRRW mm A 3* F o wn March 12, 1940. J. F. HARRISON El AL ROAD WORKING MACHINERY Filed ltug. 26, 1938 '3 Shee'ts-Sheet 2 mNNN NNN

lll ll lllll INVENTORS. JOHN F. HARRISON HOLLIS- BY 35%. CRUM J M s ATTORNEYS.

Mafch 1940- J. F. HARRISON ET AL 2,193,367

ROAD WORKING MACHINERY Filed Aug. 26, 1938 3 Sheets-Sheet 5 INVENTORS. JOHN F. HARRISON HOLLIS B. CRUM BY JMMwWM ATTORNEYS- Patented Mar. 12, 1940 UNITED STATES PATENT OFFICE Marion,

Ohio

Application August 26, 1938, Serial No. 226,958

8 Claims. (01. 280-335) This invention relates to road working machinery, and more particularly to the type of road working machinery shown in our application No. 169,531, filed October 18, 1937.

In the aforesaid application, we have provided an extremely simple and flexible machine adapted for operating on various types of road building and road maintenance work as well as on various types of road contour.

In the aforesaid application, there is disclosed and claimed an elongated frame having a tractor pivotally connectedto one end thereof, a wheeled support pivotally connected to the other end thereof, with means for varying the angular relation of both the tractor and the wheeled support with respect to the frame whereby the machine may be operated with the wheeled support in offset parallel relation with respect to the tractor as well as whereby the angular relation of both the tractor and the wheeled support may be varied with respect to the frame for steering purposes. In the aforesaid application, the specific means for controlling the angular relation of the tractor with respect to the frame consists of cylinders and piston rods, while the specific means for varying the angular relation between the wheeled support and the said frame consists of an extensible and contractible link connected to arms projecting laterally from the rear of the tractor and from the front of the wheeled support, a variation in the length of the said link being obtained by including a cylinder as a portion of the link, with means for supplying fluid under pressure to the said cylinder.

A more limited object of the invention of this application consists in the substitution of means, other than those shown in our aforesaid application, for controlling the angular relation between the tractor and the wheeled support and the frame.

In the drawings herein, Fig; 1 is a plan view of a power grader embodying our invention, the positions of the parts when the wheeled support is in parallelbut offset relation to the tractor being shown in dot-and-fdash lines; Fig. 2 a fragmentary side elevation of the power grader shown in Fig. 1; and Fig. 3 a detail in section through the power-control box; Fig. 4 a view, similar to Fig. 1, of a modified form of the apparatus shown in the formerview; Fig. 5 a side elevation of the apparatus shown in Fig. 4-; Fig. 6 a diagrammatic view of the fluid pressure system for controlling the angular relation between ,the tractor and the wheeled support and the frame; Fig. '7 a plan view of the tractor-end of the apparatus shown in Fig. 4 and showing the use with the frame of stable traction means; Fig. 8 a side elevation of the part of our apparatus shown in Fig. 7; and Fig. 9 is a rear elevation of the wheeled support used in various forms of our apparatus shown 5 herein.

Describing our apparatus first in connection with Figs. 1-3 inclusive, I0 denotes the main frame, which is in 'the form of an elongated beam or pipe to one end of which is rigidly secured an 10 element I I comprising upper and lower horizontal forks l2, the said forks mating with forks l3 secured to and projecting rearwardly from the frame of the tractor M, the tractor and the frame being pivotally connected by a vertical pivot pin l5 l5 to which the forks l2 are secured by pins 12. The frame I0 is provided at its opposite end with a forked fitting Hi, the forks of said fitting mating with forks I1 carried by a caster element I! which extends downwardly, terminating in a bi- 20 furcated lower end ll to which the axle I8 is pivoted by means of a central pin IS. The caster element I1 and the frame 10 are connected by means of the vertical pivot pin 20 to which the forks I1 are secured by pins. l'l.

The earth-working means, indicated generally at 2|, may be attached to the frame by means of suitable bars 22 pivotally connected at 23 to an element 24, for movement about a horizontal axis, the element 24 in turn being pivoted about 30 a stud 25 for movement about a vertical axis. Any conventional controls may beused for altering the position of the earth-working means with respect to the frame, .both vertically and laterally, and for maintaining any set relation of said ele- 35 ments. The means indicated conventionally herein comprises a horizontal shaft 26 extending transversely of the frame I0, arms 21'secured to the opposite ends of said shaft, and links 28 connecting said arms with the earth-working means. 40 The shaft 26 maybe rotated by any convenient means, as by a shaft 29 which may be provided with a worm within the casing 30 meshing with a worm gear on said shaft.

For the purpose of varying theangular relation 45 between the tractor and the wheeled supDQrt and the frame III, we have provided the following construction and arrangement of parts: M'- denotes a worm gear,-keyed to the pin i 5, and

32 a similar worm gear, keyed to the pin 20. 33 50' denotes a power control box, preferably mounted upon the tractor frame. 34 denotes a shaft which extends across and is joumaled in the front of the tractor frame, said shaft projecting through one end of the box and being provided thereon 5 I with a pulley 35 adapted to be driven from the power take-oil shaft 35 through a pulley 31 on the latter shaft and a V-belt 33. Mounted on the shaft 34 are the idle bevel gears 39, 40, 4| and 42. Interposed between the bevel gears 39 and 40 is a jaw clutch 43; and interposed between the bevel gears 4| and 42 is a jaw clutch 44. 45 denotes a shaft having at one end thereof a worm 45 meshing with the worm gear 3| and having at its opposite end a bevel gear 41 meshing with the bevel gears 39 and 40. 48 denotes a shaft having on one end thereof a bevel gear 49 meshing with the bevel gears 4| and 42. This shaft extends through the power-control box and is connected by a universal joint 49 with ashaft 50 the opposite end of which is connected by a universal joint 5|, including the spline 52, with the shaft 53 having the worm I1 thereon. Idly mounted on the shaft 45, within the power control box, is a sprocket 54; and rigid with the shaft 48 is a cooperatingsprocket 55, said sprockets being connected by a sprocket chain 55. A jaw clutch 51 on the'shaft 45 is interposed between the bevel gear" and the sprocket 54.

With the parts constructed and arranged a described, the operation will be as follows: When it is desired to adjust the angular relation of both the wheeled support and the tractor with reference to the frame I0, the clutch 51 is en-' gaged with the idle sprocket 54 and the clutch 44 is engaged with either of .the gears 4| and The shaft 48 will then be driven through the gear 49 and the shaft 45 through the sprockets 54 and 55 and chain 55. 'Thetractor and the wheeled support may be'set at the desired angle on either side of the frame I0, dependent upon the engagement of the clutch 44 with one or the other of the gears 4| and 42:

When it is desired to control the angular relation of the tractor and the wheeled support to the frame independently of each other, the clutch 51 is engaged with the bevel gear 41. The jaw clutch 43 is then moved into engagement with either of the bevel gears 39 and 40, and the shaft 45 will be rotated in either direction, imparting like movement to the worm 45 and setting the tractor at the desired angle with respect to the frame, on either side thereof. Likewise, if the clutch 44 is engaged with either of the gears 4| and 42, while the sprocket 54 is idle, corresponding direction of rotation is imparted to the shafts 48, 50 and 53 whereby the wheeled support will be set at the desired angle with respect to the frame, on either side thereof. The spline 52 may be considered as an extension of the shaft 50, enabling the latter to be longitudinally extensible and contractible in length to accommodate variations in the angular relation between the adjacent portion of the frame l0 and the wheeled support, the wheels whereof are indicated at 50.

In Figs. 4-8 inclusive, there is shown a modiflcation of our' invention wherein the angular relation of the tractor and of the wheeled support with reference to the frame are controlled by hydraulic means. Referring more particularly to Figs. 46, inclusive, I00 denotes the frame having forks |0| at one end which cooperate with mating forks I02 carried by a portion I03 of the frame of the tractor, indicated at I04. A vertical pin I05 connects the aforesaid forks. The other end of the frame is also provided with a vertical hub I05 which is received between forks I01 on a caster element I 05, the pin I03 extending through the forks and the hub providing a vertical pivotal connection between the frame and the caster element. This caster element is similar to the caster element in the preceding form of our invention and is provided with a bifurcated lower end IIO, to which the axle III is pivotally connected by means of a central pin I2, the said axle having the wheels II3 thereon. I4 denotes an arm projecting laterally from the end of the tractor frame I03 adjacent to the frame I00 and 5 an arm extending laterally from the caster element I08. These arms are connected'by extensible and contractible linkage means comprising a cylinder 5 carried by the frame I03, pistons III and H8 in said cylinder and piston rods -II9, I20 connected to said pistons, respectively, the former piston rod having its outer end pivotally connected by a pin |2| to an arm I22 projecting laterally from the adjacent portion of the frame I00 and slidably mounted thereon at I22. The piston rod I20 has its outer end connected in like manner by the pin I23 and to the arm I24 projecting laterally from the opposite portion of the frame I00 and slidably mounted thereon at I24'}. Links I25 and I25 are each pivotally connected at one end to the pins I2I and I23, respectively, and at their other ends to pins I21, I29 carried by the arms II4, |I5,respectively.

The earth working means, indicated generally at I29, may be attached to the frame by means of suitable bars I30 pivoted to an element |3I for movement about a horizontal axis, the element I3.I being in turn pivoted about a stud I32 for movement about a vertical axis. Any conventional controls I33 may be used for altering the position of the earth working means both vertically and radially and for maintaining any set relations of said elements.

In Fig.6 there is shown a diagrammatic view of the hydraulic system whereby the supply of fluid to the cylinder H5 is controlled, for the purpose of enabling either the tractor and the wheeled support to be set at any desired angle with respect to the frame, independently of each other;

1 also to enable both the tractor and the Wheeled of the cylinder between the pistons H1, .8; and

from the bottom of the valve casing I40, pipe I45 leads to the end of the cylinder II5 behind the piston "1. Also from the side of the valve casing I45, opposite the side .to which the branch pipe I43 is connected, pipe I45 leads back to the sump. A pipe I43 leads from the top of the valve casing 139 to the other end of the cylinder H8, behind the piston |I8 therein. A pipe I43 from the bottom of the said casing leads to the pipe I45; and a pipe I5I leads from the side of the said casing, which is opposite the connection I42, to the pipe I45. A pipe I41 is connected to the top of the valve casing I38 and also to the pipe I43rand the pipe I43 connected to the bottom of the valve casing is connected to the pipe I44. .1

With the parts arranged as described, the manner in which the hydraulic controls operate can be readily understood. When the valve I33 is in the open position shown in Fig.- 6 while the othervalves are closed, the oil or other operating liquid is supplied through pipes I48 and I44 between the pistons II! and H8. The piston III is held against movement by the closing of the valve I40. However, the piston H8 is free to move, the liquid being delivered thereby through pipes I43, I41 and I50 to the pipe I46 leading to the sump. This will result in moving the piston rod I20 to the left, thereby setting the wheeled support at an angle with respect to the frame, as shown in the dot-and-dash lines in Fig. 4. To reverse the movement of the piston II8, one merely reverses the position of the valve I38.

When the valves I38 and I40 are closed, and valve I39 is in the open position, the pressure fluid can flow through pipes I49 and I45 to the end of the cylinder IIB, behind the piston II I,

and the liquid between the piston H8 and the other end of the cylinder can be discharged through pipes I43 and I5I into the sump pipe I46, thereby permitting both piston rods H9 and I20 to be moved rearwardly. This will result in placing the wheeled support and the frame I00 in the position shown by the dot-and-dash lines in Fig. 4. To reverse the movement of both pistons II! and H8, merely reverse the position of the valve I39.

With both valves I38 and- I39 closed and the valve I40 in the open position, pressure liquid will be supplied through pipe I45 to the right hand end of the cylinder I I6, thereby tending to move the piston III to the left. This movement is permitted by the venting of the cylinder, between the pistons, through pipes I44 and I46, into the sump. By moving the valve I40" to thereverse position, the movement of the piston II'I may be reversed. By so operating the valve I40, the tractor will be moved to one side or the other of the frame.

Figs. 7 and 8 show the tractor end of the apparatus which is illustrated in Figs. 4 and 6, with the substitution of a stable traction means, in the form of a tractor of the crawler type, for the tractor shown in the preceding views. Where such a stable tractor is provided, a double pivotal connection between the frame I00 and the tractor is'desirable. The tractor is shown generally at I60, being provided with a frame extension I6I received between the forks I62 of a connecting member I62 extending downwardly from the adjacent end of the frame I00. The frame extension I62 is pivotally connected to the connecting member by a horizontal pivot pin I63 and the connecting member in turn is cormected to the frame I00 by a vertical-pivot pin I64.

In all other respects, the form of our invention shown in Figs. 7 and 8 is identical with that shown in Figs. 4-6 inclusive.

It will be understood that road working machinery constructed in accordance with our invention herein is capable of being operated in either direction by the tractor.

Having thus described our invention, what we claim is: f

1. In a road working device, in combination, traction means, rolling supporting means, an elongated frame, means connecting one end of the said frame with said traction means and the other end of said frame with the rolling supporting means so as to be capable of angular movement with respect to both of said means about substantially vertical axes, operative connections between said traction means and said supporting means for automatically varying the angular relation of one of said means with respect to said frame in response to a change in angular relation between the said frame and the other of said means and in such direction as to maintain parallelism in the direction of movement of the traction means and the supporting means, a-

power take-off from said traction means, a shaft driven by said power take-off, and means controlled by the rqtationof said shaft for operating the aforesaid connections.

2. In a road working device, in combination, traction means, rolling supporting means, an elongated frame, means including a vertically disposed pin for pivotally connecting the traction means with one end of said frame, means includof or in unison with each other.

3. In the combination recited in claim 2, the

second shaft being longitudinally extensible and contractible.

4. In a road working device, in combination, a traction element, a rolling supporting element, an elongated frame element, means including a vertically disposed pin for pivotally connecting the traction element with one end of said frame element, said pin having a driving connection with one of the two last mentioned elements, means including a'pin for pivotally connecting the rolling supporting element with the opposite end of the said frame element, said pin having a driving connection with one of the two last mentioned elements, a gear secured to each of the said pins, a shaft having a gear thereon meshing with the gear on the first-mentioned pin, a shaft having a gear thereon meshing with the gear on i 5. In the combination recited ill claim 4, the

second shaft being longitudinally extensible and contractible. s

' 6. In a road working device, in combination, a traction element, a rolling supporting element, an elongated frame element, means including a vertically disposed pin for pivotally connecting the traction element to one end of said frame element, said pin having a driving connection with one of the two last mentioned elements, means including a vertically disposed pin for pivotally connecting the rolling supporting element to the opposite end of the said frame element, said pin having a driving connection with one of the two last mentioned elements, a gear secured to each of the said pins, a shaft having a gear thereon meshing with one side of the gear on the first mentioned pin, a shaft having a gear thereon meshing with the opposite side of the gear on the second mentioned pin, a third shaft and means for driving the same, and connections between the last mentioned shaft and the two first mentioned shafts for rotating the two first mentioned shafts either independently of or in unison with each other.

10 means for pivotaily connecting the rolling sup porting me ns with the opposite end of said frame, 9. tr: ,ion power ta e-ofi, a shaft driven thereby. a shaft for varying the angular relation between the traction means and the elongated frame, a shaft for varying the angular relation between the rolling supporting means and the elongated frame, and connections between the first mentioned shaft and the second and third shafts for rotating the. said second and third shafts either independentlyof or in unison with each other.

JOHN F. HARRISON. HOLLIS B. CRUM. 

